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Development of the ITHIM-R, also known as ITHIM version 3.0. Started in January 2018.
This document aims to be a comprehensive record of the calculations in the ITHIM pipeline, specifically the ITHIM- R package. Some details here are specific to the Accra version of that model, as Accra has been the setting for construction of the prototype.
In this document, in general, lower-case letters correspond to indices, or dimensions, of objects, and take one of a set of possible values, detailed in Table 1 (Convert from LATEX).
The set of fixed input data items are denoted by capital letters, and variable parameters are denoted by greek letters. These are tabulated in Table 2 (Convert from LATEX).
In general ITHIM-R requires X number of user defined inputs from various data sources. There are also numerous assumptions that you can parameterize in the model.
- Synthetic Population
- Travel survey
- Leisure time and work physical activity
- Who Hit Who Matrix
- Police report data
- Air Pollution
- Background concentrations of PM2.5
- Source apportionment of PM2.5 for vehicles
- Country or City specific Vehicle Emissions Factors
Description The first input you will need to provide is the synthetic population data. This data typically comes from a household travel survey or travel time use survey, and a self-report leisure time physical activity survey. These data will be uses throughout the process.
Synthetic Population Dataset Format You should have a table with the following variables
- trip_id
- trip_mode
- trip_duration
- participant_id
- age
- sex
- age_cat
- ltpa_marg_met
- work_marg_met
Montreal Synthetic Population Dataset Example
Description TEXT HERE
Who Hit Who Matrix Dataset Format A matrix
Montreal Who Hit Who Matrix Dataset Example
Description TEXT HERE
Air Pollution Dataset Format A matrix
Montreal Air Pollution Dataset Example
We are currently working on developing a separate package to create a synthetic population
For further documentation consult the wiki. For ongoing discussions, see issues. In addition, relevant documents are stored in shared GDrive folder, and a Slack channel is available for communications among contributors.